add cross-fetch

src/__tests__/create-signed-fetcher.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it, vi } from "vitest";
-import { createSignedFetcher } from "../create-signed-fetcher";
+import { createSignedFetcher } from "../create-signed-fetcher.js";
 
 describe("createSignedFetcher", () => {
 	it("should create a signed fetcher", async () => {

src/__tests__/get-fetch.test.ts

@@ -1,5 +1,5 @@
 import { afterEach, describe, expect, it, vi } from "vitest";
-import { getFetchFn } from "../get-fetch";
+import { getFetchFn } from "../get-fetch.js";
 
 describe("getFetchFn", () => {
 	// Set up a global fetch mock

src/__tests__/get-headers.test.ts

@@ -1,6 +1,6 @@
 import "cross-fetch/polyfill";
 import { describe, expect, it } from "vitest";
-import { getHeaders } from "../get-headers";
+import { getHeaders } from "../get-headers.js";
 
 describe("getHeaders", () => {
 	it("should return an empty Map if no arguments are provided", () => {

test/commonjs/index.test.ts

@@ -1,3 +1,4 @@
+import "cross-fetch/polyfill";
 import { expect, test } from "vitest";
 import { createSignedFetcher } from "../../dist/index.cjs";
 

test/esm/index.test.ts

@@ -1,3 +1,4 @@
+import "cross-fetch/polyfill";
 import { expect, it } from "vitest";
 import { createSignedFetcher } from "../../dist/index.js";